Garage door locking device



FIG. 1 is a view in side elevation of my new garage door locking device;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a rear elevation view thereof. 

The ornamental design for a garage door locking device, as shown. 